can’t leave my ex alone with my son daughter

Krissy is a single mother to her 7-month-old son. Two weeks after she told her boyfriend she was pregnant, he dumped her for someone else. She’s been alone ever since. But now Krissy wants to go to college in the fall but she can’t afford day care (did I mention being a single mom is tough). Here’s what she wrote me, “He (my ex) is so irresponable with him, he wont listen to me when I try to tell him things, like support him better when you hold him, (he has almost dropped him several times) he has fallen off the bed in his care, he got stuck under a chair in his care, he often ignores him. I’m so afraid something terrible is going to happen to my son out of neglect…” I think it’s clear this guy should not, under any circumstances, be left alone with his son. What do you think?